Problem command system Linux

Question

I have problem in command is not working correctly
I want to sort third field and fourth field using command
$ sort -t. -k3n -k4n sort

delimiter is point '.'
-n, --numeric-sort : compare according to string numerical value.

$ nano sort
$ cat sort
192.168.1.245.www.test.com.80

192.168.1.17.www.test.net.8012

192.168.2.5.www.test.org.8001

192.168.3.1.www.test.ma.8098

192.168.2.15.www.test.to.8080

$ sort -t. -k3n -k4n sort

192.168.1.17.www.test.net.8012
192.168.1.245.www.test.com.80
192.168.2.15.www.test.to.8080
192.168.2.5.www.test.org.8001
192.168.3.1.www.test.ma.8098

It has to be like this because 5 < 15
192.168.1.17.www.test.net.8012
192.168.1.245.www.test.com.80
192.168.2.5.www.test.org.8001
192.168.2.15.www.test.to.8080
192.168.3.1.www.test.ma.8098

Answer 1

You have to specify where the sort keys start AND end.

sort -t. -k3,3n -k4,4n sort

Answer 2

Wlcm

Answer 3

Thx